@import url('/assets/guide-fonts.css?v=20261005-06');
:root{color-scheme:light;--ink:#0a183c;--muted:#64779f;--blue:#3f7ef3;--line:#c7d6ec;--serif:GuideSerif,"Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,serif}
*{box-sizing:border-box}
html{min-width:320px;min-height:100%;background:#f7faff;overflow-y:scroll;scrollbar-gutter:stable}
body{margin:0;color:var(--ink);font-family:var(--serif);-webkit-font-smoothing:antialiased;overflow-wrap:break-word}
a{color:inherit;text-decoration:none}button,input{font:inherit}a,button{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #3777eb;outline-offset:6px}
.skip-link{position:fixed;z-index:10;top:10px;left:10px;padding:12px 18px;background:white;transform:translateY(-160%)}.skip-link:focus{transform:none}
.backdrop{position:fixed;inset:0;z-index:-1;pointer-events:none;background:#f7faff url('/assets/hero-background.webp') center center/cover no-repeat}
.site-shell{width:min(1328px,88%);min-height:100vh;min-height:100svh;margin:0 auto;display:flex;flex-direction:column}
.site-header{min-height:99px;display:flex;align-items:center;justify-content:space-between;gap:40px;border-bottom:1px solid var(--line)}
.brand{font-size:40px;font-weight:800;letter-spacing:3px;white-space:nowrap;line-height:1.35}
.main-nav{display:flex;align-items:center;gap:clamp(30px,3.8vw,58px);padding-top:5px;white-space:nowrap;font-size:22px;font-weight:500}
.main-nav a{padding:12px 0;transition:color .2s ease}.main-nav a:hover,.main-nav a[aria-current]{color:var(--blue)}
#main{flex:1;display:flex;outline:none}
.hero{width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:70px 0 100px}
.hero h1{margin:0;font-size:clamp(42px,5.15vw,78px);font-weight:800;line-height:1.25;letter-spacing:2px}.hero h1 span{display:block}
.hero-description{margin:24px 0 35px;color:var(--muted);font-size:clamp(20px,1.85vw,28px);font-weight:400;line-height:1.45;letter-spacing:1px}.hero-description span{display:block}
.start-button{display:inline-flex;justify-content:center;align-items:center;width:375px;max-width:100%;min-height:82px;border-radius:12px;background:linear-gradient(180deg,#4c8af8,#3777e3);box-shadow:0 7px 20px #3f80e940;color:white;font-size:34px;letter-spacing:4px;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.start-button:hover{transform:translateY(-2px);box-shadow:0 10px 25px #3f80e950}.start-button:active{transform:translateY(0)}
.site-footer{min-height:78px;border-top:1px solid var(--line);display:flex;justify-content:center;align-items:center;gap:25px;color:var(--muted);font-size:16px}.site-footer a:hover{color:var(--blue)}
body.reading .backdrop{opacity:.5}body.reading #main{display:block}
.reading-content{max-width:920px;margin:0 auto;padding:55px 0 70px;font-family:var(--serif);line-height:1.9}.breadcrumb{font-size:15px;color:var(--muted);margin-bottom:20px}.breadcrumb a{color:var(--blue)}
.reading-content h1{font-size:clamp(30px,3vw,42px);line-height:1.4;margin:0 0 14px;font-weight:750}.reading-content h2{font-size:24px;margin:32px 0 10px}.reading-content p,.reading-content li{font-size:18px;color:#405373}.reading-content ul{padding-left:25px}.lead{color:var(--muted)!important;margin-top:0}.notice{padding:18px 24px;border:1px solid #d9e5f6;border-radius:14px;background:#ffffffba;margin:25px 0}.notice p{margin:0}
.chapter-article{line-height:1.95}.chapter-article h1{margin-bottom:28px}.chapter-article h2{font-size:26px;margin:42px 0 18px;line-height:1.6}.chapter-article h3{font-size:21px;line-height:1.65;margin:28px 0 12px;font-weight:700}.chapter-article p{margin:16px 0}.chapter-article li{margin:12px 0}.chapter-article strong{font-weight:700;color:#17294c}.chapter-article hr{height:1px;border:0;background:#d6e1f1;margin:38px 0}.chapter-article blockquote{margin:0 0 28px;padding:8px 24px;border-left:4px solid #6091e7;background:#eef4fdc9;border-radius:0 12px 12px 0}.chapter-article blockquote p{color:#354e78}.chapter-article ol{padding-left:28px}.chapter-article code{font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;background:#edf2fa;color:#2b466d;font-size:.88em;border-radius:5px;padding:2px 5px;overflow-wrap:anywhere}.chapter-article pre{max-width:100%;min-width:0;overflow-x:auto;padding:22px;background:#f0f4fa;border:1px solid #d6e1f1;border-radius:12px;font-size:14px;line-height:1.8;white-space:pre}.chapter-article pre code{background:none;padding:0;white-space:pre;overflow-wrap:normal;font-size:inherit}.component-brief{margin:26px 0;padding:4px 22px;background:#f4f7fccf;border:1px dashed #b3c8e7;border-radius:12px}.component-brief p{font-size:16px;color:#607392;line-height:1.9;overflow-wrap:anywhere}.article-table{max-width:100%;overflow-x:auto;margin:25px 0;border:1px solid #cddbef;border-radius:12px;background:#ffffffd9}.article-table table{width:100%;min-width:680px;border-collapse:collapse;table-layout:fixed;font-size:16px;line-height:1.8}.article-table th,.article-table td{padding:16px 18px;text-align:left;vertical-align:top;border-bottom:1px solid #dbe4f2;border-right:1px solid #dbe4f2;color:#405373;overflow-wrap:break-word}.article-table th{background:#edf3fc;color:#15294c;font-weight:700}.article-table th:first-child{width:25%}.article-table tr:last-child td{border-bottom:0}.article-table th:last-child,.article-table td:last-child{border-right:0}
.chapter-list{list-style:none;padding:0!important;display:grid;gap:14px;margin:28px 0}.chapter-card{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 24px;border:1px solid #d9e5f6;border-radius:14px;background:#ffffffba}.chapter-card strong{font-size:21px;color:var(--ink)}.chapter-card p{margin:5px 0 0;font-size:16px}.chapter-card .status{flex-shrink:0;font-size:14px;color:var(--muted)}a.chapter-card:hover{border-color:#9bbcf6;background:#fff}
.glossary-search{width:100%;padding:14px 18px;border:1px solid #c7d6ec;border-radius:12px;background:#fff;color:var(--ink);font-size:18px;margin:18px 0}.glossary-list{margin:0}.glossary-list dt{font-weight:700;font-size:20px;margin-top:22px}.glossary-list dd{margin:6px 0 20px;color:#405373;font-size:18px}.empty-result{color:var(--muted)}details{border-bottom:1px solid #dce5f2;padding:18px 0}summary{cursor:pointer;font-weight:600;font-size:19px}details p{margin:12px 0 5px}.text-link{color:var(--blue);text-decoration:underline;text-underline-offset:4px}
@media(min-width:1800px){.brand{font-size:42px}.hero h1{font-size:84px}}
@media(max-width:1000px){.site-shell{width:90%}.brand{font-size:30px;letter-spacing:2px}.main-nav{font-size:18px;gap:25px}.hero-description{max-width:85%;font-size:22px}.hero-description span{display:inline}.hero h1{font-size:clamp(40px,5.2vw,58px)}.start-button{width:310px;min-height:72px;font-size:29px}}
@media(max-width:640px){.site-shell{width:90%}.site-header{min-height:124px;display:flex;flex-direction:column;justify-content:center;gap:13px;padding:18px 0 12px}.brand{font-size:28px;letter-spacing:2px}.main-nav{width:100%;justify-content:space-between;gap:0;padding:0;font-size:15px}.main-nav a{padding:7px 0}.hero{padding:60px 0 80px}.hero h1{font-size:clamp(26px,6.4vw,39px);line-height:1.6;letter-spacing:0}.hero-description{max-width:94%;font-size:18px;line-height:1.85;letter-spacing:0;margin:22px 0 30px}.hero-description span{display:block}.start-button{width:252px;min-height:64px;font-size:26px;border-radius:10px;letter-spacing:3px}.site-footer{min-height:72px;gap:17px;font-size:13px}.backdrop{background:radial-gradient(ellipse at center,#fff 30%,#eef5ff 100%)}.backdrop:before,.backdrop:after{content:"";position:absolute;inset:0 auto 0 0;width:35%;opacity:.55;background:url('/assets/hero-background.webp') left center/auto 100% no-repeat;mask-image:linear-gradient(to right,#000,transparent);-webkit-mask-image:linear-gradient(to right,#000,transparent)}.backdrop:after{left:auto;right:0;background-position:right center;mask-image:linear-gradient(to left,#000,transparent);-webkit-mask-image:linear-gradient(to left,#000,transparent)}.reading-content{padding:32px 0 45px}.reading-content h1{font-size:29px}.reading-content h2{font-size:22px}.reading-content p,.reading-content li,.glossary-list dd{font-size:16px}.chapter-card{padding:16px;gap:10px}.chapter-card strong{font-size:18px}.chapter-card p{font-size:14px}.chapter-card .status{font-size:12px}.notice{padding:15px 18px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:640px){.chapter-article h1{font-size:28px;line-height:1.55;margin-bottom:22px}.chapter-article h2{font-size:22px;margin:34px 0 14px}.chapter-article h3{font-size:19px;margin:24px 0 10px}.chapter-article blockquote{padding:5px 16px}.chapter-article p,.chapter-article li{font-size:16px}.component-brief{padding:3px 15px}.component-brief p{font-size:14px}.chapter-article pre{padding:16px;font-size:12px}.article-table table{font-size:14px;min-width:630px}.article-table th,.article-table td{padding:12px 14px}.chapter-article hr{margin:30px 0}}
.chapter-article h4{font-size:19px;line-height:1.7;margin:24px 0 12px;color:#17294c}
.chapter-article li>ul,.chapter-article li>ol{margin-top:10px;margin-bottom:16px}
.chapter-article li>p{margin:10px 0}
@media(max-width:640px){.chapter-article h4{font-size:17px}.chapter-article li>ul{padding-left:20px}.chapter-article li>ol{padding-left:24px}}
.chapter-layout{position:relative;max-width:920px;margin:0 auto;padding:55px 0 70px}
.chapter-main{min-width:0}
.chapter-layout .chapter-article{max-width:none;margin:0;padding:0}
.chapter-sidebar{position:absolute;top:55px;bottom:70px;left:calc(100% + 24px);width:min(248px,calc((100vw - 920px)/2 - 44px));min-width:0}
.chapter-menu{position:sticky;top:28px;max-height:calc(100vh - 56px);max-height:calc(100dvh - 56px);overflow-y:auto;scrollbar-width:thin;border:1px solid #d3e0f2;border-radius:15px;padding:18px;background:#ffffffed;box-shadow:0 5px 24px #21497506}
.chapter-menu>summary{display:flex;align-items:center;gap:12px;list-style:none;font-size:18px;line-height:1.6;color:#203957}
.chapter-menu>summary::-webkit-details-marker{display:none}
.chapter-menu>summary:after{content:"+";font-family:system-ui,sans-serif;font-size:19px;font-weight:400;margin-left:auto;color:#7084a5}
.chapter-menu[open]>summary:after{content:"−"}
.chapter-menu>summary:focus-visible{outline:3px solid #3777eb;outline-offset:5px;border-radius:3px}
.chapter-menu-current{display:none;font-size:13px;color:#6480a4;font-weight:400}
.chapter-menu nav{margin-top:15px}
.chapter-menu ol{list-style:none;padding:0;margin:0;display:grid;gap:5px}
.chapter-menu-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:8px;min-height:44px;font-size:16px;color:#455d82;line-height:1.7}
a.chapter-menu-item{transition:background .18s ease,color .18s ease}
a.chapter-menu-item:hover{background:#f1f6fd;color:#2868c4}
a.chapter-menu-item[aria-current=page]{color:#2365bd;background:#eaf2ff;box-shadow:inset 2px 0 #4c83df;font-weight:600}
.chapter-number{font-size:12px;font-variant-numeric:tabular-nums;letter-spacing:1px;flex-shrink:0}
.chapter-menu-item.is-pending{color:#788aa6}
.chapter-menu-item small{display:block;font-size:11px;color:#8b9bb2;font-weight:400}
.chapter-pager{display:flex;gap:18px;justify-content:space-between;border-top:1px solid #d1def0;padding-top:26px;margin-top:48px}
.chapter-pager-link{display:flex;flex-direction:column;gap:7px;flex:1;max-width:calc(50% - 9px);padding:18px 22px;border:1px solid #d3e0f2;border-radius:13px;background:#ffffffdc;color:#294771;line-height:1.6;transition:background .18s ease,border-color .18s ease}
.chapter-pager-link:hover{background:#f0f6ff;border-color:#9ab9e8}
.chapter-pager-link.next{margin-left:auto;text-align:right}
.pager-direction{font-size:14px;color:#6a80a4}
.chapter-pager-link strong{font-size:19px;font-weight:600}
@media(min-width:1280px) and (max-width:1440px){.chapter-menu{padding:12px 10px}.chapter-menu>summary{font-size:16px;gap:6px}.chapter-menu-item{padding:9px 7px;gap:7px;font-size:14px}.chapter-number{font-size:11px}}
@media(max-width:1279px){.chapter-sidebar{position:static;top:auto;bottom:auto;left:auto;width:auto;margin-bottom:28px}.chapter-menu{position:static;max-height:none;overflow:visible;padding:15px 18px}.chapter-menu-current{display:inline;margin-left:auto}.chapter-menu>summary:after{margin-left:0}.chapter-menu ol{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.chapter-menu-item{font-size:15px}}
@media(max-width:640px){.chapter-layout{padding:28px 0 45px;gap:24px}.chapter-menu{padding:14px;border-radius:12px}.chapter-menu>summary{font-size:16px;gap:9px;min-height:24px}.chapter-menu-current{font-size:12px}.chapter-menu ol{grid-template-columns:repeat(2,minmax(0,1fr))}.chapter-menu-item{font-size:14px;padding:9px 8px;gap:8px}.chapter-pager{flex-direction:column;margin-top:34px;padding-top:20px;gap:12px}.chapter-pager-link{max-width:none;padding:16px 18px}.chapter-pager-link.next{margin-left:0}.chapter-pager-link strong{font-size:17px}}
@media(max-width:640px){.chapter-sidebar{margin-bottom:24px}}